}

func TestCSSEscaper(t *testing.T) {
	input := ("\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f" +
		"\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f" +
		` !"#$%&'()*+,-./` +
		`0123456789:;<=>?` +
		`@ABCDEFGHIJKLMNO` +
		`PQRSTUVWXYZ[\]^_` +
		"`abcdefghijklmno" +
		"pqrstuvwxyz{|}~\x7f" +
		"\u00A0\u0100\u2028\u2029\ufeff\U0001D11E")

	want := ("\\0\x01\x02\x03\x04\x05\x06\x07" +

    val s = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
    for (i in s.indices) {
      assertRoundTrip(s.substring(0, i).encodeUtf8())
    }
    val random = Random(123456789L)
    val buf = ByteArray(4096)
    random.nextBytes(buf)
    assertRoundTrip(buf.toByteString())
  }

  private fun assertRoundTrip(data: ByteString) {
    val encodeBuffer = Buffer()

     */
    @Test
    public void testIsNumver() throws Exception {
        assertFalse(StringUtil.isNumber(null));
        assertTrue(StringUtil.isNumber("0123456789"));
        assertFalse(StringUtil.isNumber("aaaBBBccc"));
        assertFalse(StringUtil.isNumber("０１２３４５６７８９"));
        assertFalse(StringUtil.isNumber(""));
        assertFalse(StringUtil.isNumber("01234abcdef"));
        assertFalse(StringUtil.isNumber("abcdef01234"));

)

// numeric constant conversions are in const1.src.

func string_conversions() {
	const A = string(65)
	assert(A == "A")
	const E = string(-1)
	assert(E == "\uFFFD")
	assert(E == string(1234567890))

	type myint int
	assert(A == string(myint(65)))

	type mystring string
	const _ mystring = mystring("foo")

	const _ = string(true /* ERROR "cannot convert" */ )

	// 14648 = 0x3938
	// amd64:`MOVQ\t\$3978425819141910832`,`MOVW\t\$14648`
	bsink = []byte("0123456789")

	// 1650538808 = 0x62613938
	// amd64:`MOVQ\t\$3978425819141910832`,`MOVL\t\$1650538808`
	bsink = []byte("0123456789ab")
}

// self-equality is always true. See issue 60777.
func EqualSelf(s string) bool {
	// amd64:`MOVL\t\$1, AX`,-`.*memequal.*`
	return s == s
}
func NotEqualSelf(s string) bool {

import java.net.URL;

import org.codelibs.core.net.URLUtil;
import org.junit.Test;

/**
 * @author koichik
 */
public class CopyUtilTest {

    static byte[] srcBytes = new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

    static String srcString = "ABCDEFGHIJKLMN";

    static String urlString = "あいうえお";

    InputStream is = new ByteArrayInputStream(srcBytes);

// encoding to the underscore encoding character.
var v3UnderscoreCodes = map[byte]byte{
	'_': '_',
	'.': '0',
	'/': '1',
	'*': '2',
	',': '3',
	'{': '4',
	'}': '5',
	'[': '6',
	']': '7',
	'(': '8',
	')': '9',
	'"': 'a',
	' ': 'b',
	';': 'c',
}

// toSymbolV3 converts a package path using the third mangling scheme.

}

// isShellSpecialVar reports whether the character identifies a special
// shell variable such as $*.
func isShellSpecialVar(c uint8) bool {
	switch c {
	case '*', '#', '$', '@', '!', '?', '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
		return true
	}
	return false
}

// isAlphaNum reports whether the byte is an ASCII letter, number, or underscore.
func isAlphaNum(c uint8) bool {

	{"01234567", "01234567", 0},
	{"x01234567", "01234567", 1},
	{"x0123456x01234567", "01234567", 9},
	{"xx01234567"[:9], "01234567", -1},
	{"", "0123456789", -1},
	{"3214567844", "0123456789", -1},
	{"0123456789", "0123456789", 0},
	{"x0123456789", "0123456789", 1},
	{"x012345678x0123456789", "0123456789", 11},
	{"xyz0123456789"[:12], "0123456789", -1},
	{"x01234567x89", "0123456789", -1},

func TestDirent(t *testing.T) {
	const (
		direntBufSize   = 2048 // arbitrary? See https://go.dev/issue/37323.
		filenameMinSize = 11
	)

	d := t.TempDir()
	t.Logf("tmpdir: %s", d)

	for i, c := range []byte("0123456789") {
		name := string(bytes.Repeat([]byte{c}, filenameMinSize+i))
		err := os.WriteFile(filepath.Join(d, name), nil, 0644)
		if err != nil {
			t.Fatalf("writefile: %v", err)
		}
	}